Photo from @pnw_kb #HatRockStatePark, located off U.S. Highway 730 nine miles east of #Umatilla, lies on the south shore of Lake Wallula behind McNary Dam on the #ColumbiaRiver. #HatRock was the first distinctive landmark passed by the Lewis and Clark Expedition on their journey down the Columbia, and is one of the few remaining sites not underwater. Image selected by @ericmuhr Join us in exploring #Oregon, wherever you are, and tag your finds to #Oregonexplored